ChrisGamlin
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| posted on 10/8/04 at 11:48 AM |
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Blade Expansion Tank
What do others use as a blade expansion tank?
Ive got a fabricated ally tank at the moment with 2 small feeds, one going into the bottom hose, and the other into a Y piece that feeds into the top
of the rad and also the head above the stat, but its mounted on the engine cradle and the vibrations keep cracking it after a while so Ive decided to
go for a plastic one instead.
What I need is a bottle that has two 8mm inlets coming from it, plus a sealing (non pressure release) cap. From doing a search it would seem that some
use an Astra bottle like this
Image deleted by owner
However, my expansion bottle (same layout as the ST ones) has the two feeds below the water line at the bottom of the bottle, whereas this one has one
at the top, so Im not sure it would be suitable? I guess the feed that comes off the top of the rad / stat is only a return feed anyway so could be
above the water line as in the pic above.
Chris
[Edited on 10/8/04 by ChrisGamlin]
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mangogrooveworkshop
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| posted on 10/8/04 at 12:08 PM |
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Why dont you isolate the tank with some bobins. Cost pennies! Just an idea
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locoboy
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| posted on 10/8/04 at 12:46 PM |
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or move it 
I assume it is the joint between the outlet and the tank that keeps breaking?
can you or someone not turn up an ally sleve to go over it and get it welded onto the tank to give it a bit more wall thickness - just an idea which
will be cheap and allows you to keep the original tank and in the same position.
If its breaking somewhere else then im buggerd for ideas
ATB
Locoboy
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loafersmate
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| posted on 10/8/04 at 04:02 PM |
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I'm using a veedub jobbie (sphere shaped) but it has a pressure cap so may not be of use to you?? Has 15mm ish connection on the bottom which
I've tee'd into the bottom hose and a 8mm one at the top which the thermostat bleed goes into..........works fine.
Cheers
Ben
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ChrisGamlin
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| posted on 10/8/04 at 07:12 PM |
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Its actually cracking where the mounts are welded to the body of the tank. Its the second tank Ive had on the car, the first was the actual ST square
tank but that cracked along a folded edge.
This second one is a design thats been used on lots of other race cars before without a problem, but even with it mounted on rubber its still cracked
again after being re-welded and dye pen'd to ensure no cracks, so for a cheap and easy solution I thought Id just replace it with a plastic one.
The problem is that its sods law that things like this crack at the start of a trackday meaning you're faffing around with Araldite etc in an
attempt to seal it, and / or lose a portion of the day, so Id rather sacrifice a bit of bling and go for a manky plastic one if its gonna guarantee
reliability.
Chris
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Hellfire
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| posted on 10/8/04 at 11:11 PM |
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Ours is from a Rover 4** series... only monted on one side and I think has two inlets/outlets not sure to size tho' Chris... have a look at our
pics... may help?
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Jon Ison
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| posted on 11/8/04 at 03:57 PM |
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Chris, thats the tank i used on the isonblade, cav/astra, fits fine, got latest nissan micra on this one, explanation, it was FOC, there allways the
best ones.
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